Newcomer Gabourey Sidibe plays Precious and Mo'nique plays her mother; Paula Patton and Mariah Carey also make appearances. In addition to a spectacular-looking trailer, the design geek in me has to give Lionsgate props for this poster:

…which is powerful and very much like some of the old posters designed by the great Saul Bass.

Precious premiered at Sundance in January and will be shown at the Cannes Film Festival (which started yesterday) but won't make its theatrical release in the U.S. until November (Oscar season!).